I was actually thinking you may want to do the remote relearn for each key... I'll explain... for the relearn process to register all your working keys, you need to do them all at the same time... key initialization (new from the dealer) is different than relearn for the remote...

This is what I did exactly:

Close all doors and lock vehicle with center console button.


Any key that will start the X! Put in ignition and turn to run, but don't start! Pause for one-one thousands. Turn off and remove key.

Push and hold UNLOCK button on remote, press LOCK button three timesat normal pace! (Don't rush it!)

Release UNLOCK button... If this worked, your locks will cycle...

Put key in ignition and start X... only that key will work for your remote... test it... if that worked, you can add others or just stay with that... too add others, do same thing but do all the keys you want, up to five, at the same program time...

I'm still tired, so please don't yell at me if I flubbed any of this up!

Cheers!

__________________
2001 E53 X5 4.4i (03-07-2001 build date) White exterior / hellbeige interior (6MT swap vehicle - Manny)
2002 E53 X5 4.6is (12-20-2001 build date) Imola Red exterior / M-texture interior (Red)
2003 E53 X5 4.4i (06-26-2003 build date) Silver exterior / Black interior (Silvester II)
2008 Mini Cooper S ragtop (04-17-2008 build date) Dark Silver exterior / Gray interior ( Topless)
BMWCCA member (#4745)